Kumar, R. Naveen, R. Sriaishwarya, S. Vishali, G. Vivekanandhan, and S. Karthikeyan. 2021. “Wireless Electronic Notice Board Using GSM”. International Journal of Research in Engineering, Science and Management 4 (7): 186-88. https://journal.ijresm.com/index.php/ijresm/article/view/1027.